Gas-engine



` (Nomael.)

W. HAMMERSGHMIDT.

l I GAS ENGINE. No. 288,632. Patented NDV. 20, 1883.`

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WITNESSES.

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W. HAMMERSCHMIDT.

GAS ENGINE.

No. 288,632. Patented'NoV. 20, 1883.

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WI TJVESSES I INVEJVTQR Mira "STATES 4PATIENT Oriani@ GAS-ENGINE.

SPECIFICATION forming part of Letters Patent lvm-288,632, dated November 20, 1883. Application-filed August 20,1S83. (No model.)

who has resided for one" year last past in the y United States, and declared his intention of becoming a citizen thereof, now residing at Philadelphia and State of Pennsylvania, has

invented an Improvement in Gas-Engines, of which the following is a specification sufficiently full, clear, and exact to enable those skilled in the art to make and use the invention.

This invention relates to improvements in that class of gas-engines which are operated by the ignition and explosion of a mixture of atmospheric air and gas; and the object is to "zontal section of the engine, partly in plan view. Fig. 2 is a side elevation, partly in section.` Fig. 3 is a cross-section on line 3 3 of Fig. 4. Figs. et, 5, 6, and 7 are sections showing the different positions of the valve and piston.

In the drawings, a cylinder, A, of suitable dimensions, according to the size and power of the engine desired, contains the piston B, connected in the usual manner to the crosshead and crank on themain shaft. In said cylinder are arranged the inlet-ports a a and an air-port, b, and on the valve-seat is placed the slide-valve G. This valve is double-faced, one of its faces bearing on the valve-seat, while the other fits snugly against a cover, D, or clamping-plate, which is secured to the cylinder by stud-bolts d, provided with springs e,

placed inV recesses e', so that the cover can slightly yield to prevent sticking of the valve, and will vet bear with sufficient pressure against theback of the valve to prevent any i leakage of air and gas.

The valve is operated by a cam, eccentric, or crank, E, moving in a yoke, F, which is provided with friction-rollers,

to lessen the friction of the surfaces coming in crosshead H and connecting-rod I, operate t-he crank K. The valve is provided with a central inlet-port, f, having two branches, g and h, and with two exhaust-ports, i fi', passing entirely through the valve, which coincide with` the ports 7c k in the cover, converging to a central outlet, k2, that leads into the atmosphere.

In the central part of the cover is arranged a port or opening, Z, in which a gas-jet is continually burning, whereby the mixture of air and gas is ignited and exploded at proper intervals during the reciprocations of the engine.

The gasinlet port m has branches n n', which communicate with the port f and its branches as the valve moves in the opposite direction.

The cylinder is surroundedbyawater-jacket connected with a suitable source yof water; supply, so as to produce a constant circulation of water, and thereby keep the cylinder cool. A suitable oiling` apparatus is attached to the cylinder, by which it and the piston can be properly lubricated.

In the position in which the piston B is shown in Fig. 1 the port a is open to the at- 'plete its stroke, as illustrated in Fig. 5. A

vacuum is then created after the explosion of the gases, which causes the piston to commence its return-stroke, which is completed, as in the rst instance, by the admission ofthe mixture and its explosion. In the position shown in Fig. 6 the products of combustion are escaping into the atmosphere, immediately after which the slide-valve closes the ports a', fi', and 7c', and the ports a, t', and k are opened. As the valve is now moved in the opposite direction bymeans of the cam and yoke on the main shaft, the ports on the opposite end of the cylinder, valve, and cover are opened, and communicate with each other as 4in the iirst operation, and the piston is driven in the opposite direction.

ICO

It will thusfbe seen that the engine is made double-acting7 and much more power can be obtained with a sniall expenditure of gas; also, that the atmospheric air and gas are drawn into the cylinder and operate the piston duringthe first part of the stroke7 and are ignited then, to complete the stroke, with far more force than if exploded at the beginning of the stroke,v as is ordinarily the case.

Having thus described my invention, what I u claim, and desire to secure by Letters Patent",

with an intermediate branched supply-port, I

and a cover provided with two exhaust-ports, With an intermediate branched gas-supply port, and With a central flame-port.

2. In a gas-engine, the combination of a cylinder provided with inlet and outlet ports, a slide-valve having a branched port, j', and outlet-port z' i, and a self -adjusting` cover provided with gas-ports and two outlet-ports,

' substantially as described.

Vitnesses:

JOHN BORN, CHARLES DITTMAR. 

